Can I Kasher an immersion blender?
Question:
I have an immersion blender (a stick) and the blade is on the end of a metal stick (not plastic). It has been used for milchig (possibly hot, I don’t remember). Is there any way to kasher this stick with the blade at the end?
Answer:
Generally, you can kasher from treif, but lechatichila we don’t kasher from milchig to fleishig. In this case, as you don’t remember whether it was used for milchig, it is okay to kasher from potential milchig. (Kashering is done through הגעלה או ליבון קל)
Please see here:
Halacha #727: When Kashering an Oven from Fleishig to Milchig is OK
#8874